Steam have just announced the specifications for their protoype Steam Machines, which will be sent out to 300 lucky gamers. They have chosen to do something "special" with these protoypes, setting them apart from other consoles out there.

"The prototype machine is a high-end, high-performance box, built out of off-the-shelf PC parts. It is also fully upgradable, allowing any user to swap out the GPU, hard drive, CPU, even the motherboard if you really want to. Apart from the custom enclosure, anyone can go and build exactly the same machine by shopping for components and assembling it themselves. And we expect that at least a few people will do just that. (We'll also share the source CAD files for our enclosure, in case people want to replicate it as well.)"

The specs upon shipping are as follows:

The 300 prototype units will ship with the following components: GPU: some units with NVidia Titan, some GTX780, some GTX760, and some GTX660 CPU: some boxes with Intel : i7-4770, some i5-4570, and some i3 RAM: 16GB DDR3-1600 (CPU), 3GB DDR5 (GPU) Storage: 1TB/8GB Hybrid SSHD Power Supply: Internal 450w 80Plus Gold Dimensions: approx. 12 x 12.4 x 2.9 in high

To read the full article on the Steam Community you can click here, and to be in with a chance to get one of these beauties, you'll need to meet the conditions detailed here.